ON-LINE INSPECTION TECHNIQUES OF MANUFACTURING QUALITY OF ROLLED-STEEL SHEET

On-line measurement of manufaturing quality of rolled steel needs the performances of noncontact, high-responds, high-resolution and high aceuracy. The reccntly developed hardware makes it possible. This paper gives a review of the development of this techniques and introduces four kinds of developed measurement systems. And the future development trends in this field was also discussed.

STUDY ON SAMPLING INSPECTION SCHEME TO DIGITAL PRODUCTS IN GIS

Adopting a principle of “check_accept for the first rank,inspection for the second rank”,this paper briefly discusses the rationale of the sampling inspection and the sampling inspection schemes to digital products in GIS.The OC curve is drawn to explain the deficiency of the percent sampling inspection.Meanwhile,the method of One Time Limiting Quality of count selection is presented as the inspection scheme for production departments while the method of One Time After_inspection Mean Percent Defective Upper Limit of count selection is for acceptance departments.

Automatic Quality Inspection of Bakery Products Based on Shape and Color Information

An automatic intelligent system for the colour and texture inspection of bakery products is proposed.In this system,advance classification technique featuring Support Vector Machine and biologically inspired HMAX based shape descriptor integrated with biologically plausible RGB Opponent-Colour-Channel Descriptor is used to classify bakery products to their respective classes based on the shape and based on their colour referring to different baking durations. The results of this paper are compared with other methods for the automatic bakery products inspection. It is discovered that biologically inspired computer vision models performs accurately and efficiently as compared to the computer vision models which are not biologically plausible,in the bakery products quality inspection. It is also discovered that the One Versus One SVM and Directed Acyclic Graph SVM acquired the maximum accurate classification rate. The proposed method acquired classification accuracy of 95% and 100% for the biscuit shape and biscuit colour recognition,respectively. The proposed method is also consistently stable and invariant. This shows that the biologically inspired computer vision models have the capability to replace existing inspection methods as more reliable and accurate alternative.

Optimization of post-warranty sequential inspection for second-hand products

This paper considers an optimal sequential inspection schedule for a second-hand product after that the free nonrenewable warranty is expired. The length of warranty is prespecified and during the warranty period, the product is minimally repaired by the dealer when it fails. Following the expiration of the non-renewing warranty, the product is inspected and upgraded sequentially a fixed number of times at the expenses of the customer.At each inspection, the failure rate of the product is reduced proportionally so that the product is upgraded. The product is assumed to deteriorate as it ages and the replacement of the product occurs when a fixed number of inspections are rendered. In addition,the intervals between two successive inspections are assumed to decrease monotonically. The main objective of this paper is to determine the optimal improvement level to upgrade the product at each inspection so that the expected maintenance cost during the life cycle of the product is minimized from the perspective of the customer. Under the given cost structures, we derive an explicit formula to obtain the expected maintenance cost incurred during the life cycle of the product and discuss the method to find the optimal level of the improvement analytically in case the failure times follow the Weibull distribution. Numerical results are analyzed to observe the impact of relevant parameters on the optimal solution.

Optimal production lot size with process deterioration under an extended inspection policy

A mathematical model to determine the optimal production lot size for a deteriorating production system under an extended product inspection policy is developed. The last-K product inspection policy is considered so that the nonconforming items can be reduced, under which the last K products in a production lot are inspected and the nonconforming items from those inspected are reworked. Consider that the products produced towards the end of a production lot are more likely to be nonconforming, is proposed an extended product inspection policy for a deteriorating production system. That is, in a production lot, product inspections are performed among the middle K1 items and after inspections, all of the last K2 products are directly reworked without inspections. Our objective here is the joint optimization of the production lot size and the corresponding extended inspection policy such that the expected total cost per unit time is minimized. Since there is no closed form expression for our optimal policy, the existence for the optimal production inspection policy and an upper bound for the optimal lot size are obtained. Furthermore, an efficient solution procedure is provided to search for the optimal policy. Finally, numerical examples are given to illustrate the proposed model and indicate that the expected total cost per unit time of our product inspection model is less than that of the last-K inspection policy.

Laser ultrasonic testing for near-surface defects inspection of 316L stainless steel fabricated by laser powder bed fusion

The laser powder bed fusion(L-PBF)method of additive manufacturing(AM)is increasingly used in various industrial manufacturing fields due to its high material utilization and design freedom of parts.However,the parts produced by L-PBF usually contain such defects as crack and porosity because of the technological characteristics of L-PBF,which affect the quality of the product.Laser ultrasonic testing(LUT)is a potential technology for on-line testing of the L-PBF process.It is a non-contact and non-destructive approach based on signals from abundant waveforms with a wide frequency-band.In this study,a method of LUT for on-line inspection of L-PBF process was proposed,and a system of LUT was established approaching the actual environment of on-line detection to evaluate the method applicability for defects detection of L-PBF parts.The detection results of near-surface defects in L-PBF 316L stainless steel parts show that the crack-type defects with a sub-millimeter level within 0.5 mm depth can be identified,and accordingly,the positions and dimensions information can be acquired.The results were verified by X-ray computed tomography,which indicates that the present method exhibits great potential for on-line inspection of AM processes.

White Rabbit flavored Perfume Launched On-line Limited Sale

A few days ago, the White Rabbit's joint signed fragrance series was launched on Tmall. The products include perfumes, shower gels, body lotions, hand creams and car fragrances. According to information, White Rabbit joint signed fragrance series is available for online and offline sales. The Tmall flagship store staff said that although it is limited edition, the specific product quantity is still unclear. In fact, this is not the first time that White Rabbit has cooperated to launch peripheral products. In September 2018, the White Rabbit and the beauty brand Maxam launched a lip balm. On May 10, 2019, the White Rabbit launched a joint clothing series with the Peace Bird on the LEDIN 2019 Fashion Show.

考虑供应商自有品牌竞争的制造商质量检验策略研究

经济全球化背景下,供应商和制造商之间的关系向“竞合”转变,制造商试图放弃创新产品的严格质量检验以抢占竞争先机,却使自身可能面临召回风险。本文建立了自有品牌引入策略下制造商高水平检验和低水平检验的两阶段动态决策模型,探究供应商入侵对制造商质量检验策略的影响。研究结果表明:无论在何种情况下,制造商都有动机放弃严格的质量检验,但竞争可能会促使制造商承担更多的召回风险,而制造商抢占先机的行为并不总会降低供应商入侵风险。此外,竞争中抢占先机的行为可能使双方陷入囚徒困境,而严格的质量检验可使双方在竞争中实现双赢。

近红外光谱技术在乳及乳制品质量检测中的应用

随着生活水平的提升,人们对食品质量的关注日益增加,快速获取产品质量信息已成为热点问题之一。近红外光谱技术作为一种快速、无损、定量的检测手段,能够在短时间内获取食品的质量信息,该技术已逐渐在食品质量评价中得到广泛应用。本文综述了近红外光谱技术在乳及乳制品质量检测方面的应用,旨在为该技术在乳制品行业中的进一步应用提供参考。

桁架式机器人视觉巡检系统设计

针对当前智能制造装备存在传感器监测盲区且人工点检效率低、易出错的现状,设计一套桁架式移动机器人视觉巡检系统,实现自动监测生产线设备上电气、机械关键部位易松动易错位等问题。该系统安装在生产线上方,具有可达范围广、无拍照死角、适用场景广和不影响生产线设备动作等优点,解决传统地面移动巡检机器人占用生产线空间、拍照角度受限、无法进入复杂生产线内部点检等缺点。在智能制造技术升级的背景下,该系统具有较高的实用价值及推广意义。

标准—检测—认证体系支撑防汛抗旱产品行业高质量发展的思考

标准、检验检测和认证作为国家质量基础设施的重要组成,对产业升级、技术创新和质量提升有重要作用,已经在我国消防和环保等诸多行业发挥了重要作用。但是防汛抗旱产品领域尚未建立起成熟的标准—检测—认证体系。我国防汛抗旱产品具有种类多、类型杂、涉及行业广的特点,为规范防汛抗旱产品市场,促进防汛抗旱产品行业高质量发展,在简要分析国内外防汛抗旱领域标准—检测—认证制度基础上,针对我国防汛抗旱产品行业发展现状,提出了在防汛抗旱产品领域建设标准—检测—认证体系的相关建议。

高职农产品加工与质量检测专业学分银行模式下学分认定与转换细则研究

学分银行是当前高等职业教育中十分重要的管理模式,如何进行学习成果认证及学分转换是学分银行建设中需要解决的重点问题。本研究旨在探讨学分银行模式下学生课外学习成果的认证和转换问题,通过查阅国家专业标准和行业标准、实地走访企业等多种方式进行研究,制定了黑龙江省农产品加工与质量检测专业专科学分认定和转换细则,为学分银行在高职农产品加工与质量检测专业中的应用实践奠定了基础。

论纪检监察档案开放的路径选择

纪检监察档案开放的路径相较于其他类型档案具有其特殊性。依据《中华人民共和国档案法》和《中华人民共和国政府信息公开条例》等相关法律法规,从纪检监察档案的特殊属性出发,基于新质生产力背景,探索并提出了纪检监察档案的开放路径,尤其是要积极利用信息技术,在信息智库和数据挖掘领域,实现纪检监察档案开放的数字化、网络化、智能化。这不仅是有效发挥其政治功能和社会价值的基本前提,也是推动纪检监察档案开放工作创新发展的重要动力。

基于数字孪生的套筒智能检测生产线虚拟调试技术

针对套筒智能检测生产线调试过程中存在调试周期长、试错成本高等问题,设计了基于数字孪生(DT)和虚拟调试(VC)技术,构建了套筒智能检测生产线VC系统。基于DT五维模型的套筒智能检测生产线和VC系统结构模型,明确套筒智能检测生产线的工作原理;阐述VC系统中智能检测生产线的数字空间搭建、控制系统设计、数据同步和交互、实时状态监测、故障模拟与恢复等关键技术。通过实验,证明了该方法的可行性与有效性,并为智能检测生产线的设计提供了参考。

监管执法公平促进企业高质量发展了吗?——基于证监会随机抽查制度的准自然实验

本文以证监会随机抽查制度作为准自然实验,深入考察了监管执法公平对企业高质量发展的影响及其内在机理。研究发现,证监会随机抽查制度显著提升了上市公司的全要素生产率,即监管执法公平能够有效促进企业高质量发展。该结论经过系列稳健性检验后仍然成立。进一步检验随机抽查制度的公平性效果,发现相较于外部监管效果,随机抽查制度对企业高质量发展的促进作用主要源于监管执法“随机性”和“公开性”的提升。机制检验发现,监管执法公平通过改善会计信息质量、发挥违规惩戒效应来促进企业高质量发展。

锂离子电池生产工艺规范及安全性能检测方法概述

概述了锂离子电池生产工艺规范和安全性能检测方法,包括电芯、电芯模块和电池包的安全检测标准和注意事项。旨在提高锂离子电池产品生产工艺的规范性和安全性,从而提高品质和安全性能。此外,本文还深入解析了车用锂离子电池包的生产规范和安全监测方面的要求,并提供了指导意义,有望促进锂离子电池行业的健康发展。本文将为锂离子电池生产和安全性能提供重要的参考依据,具有较高的实用性和推广价值。

面向新质生产力的检验检测共同体构建途径探索

检测服务在社会健康运行和发展中发挥着越来越重要的作用,随着新质生产力的快速发展,新的检测项目和方法层出不穷,这就迫切需要建政产测学创合作,及时解决问题。本文调研了常州市内检验检测机构与政府、高校、产业联盟和创新创业机构的协同联动机制,总结有益的经验,分析分析当前存在的问题,提出具体的协同联动策略,为实现社会经济的可持续发展提供有力的检测服务。

深水半潜式生产平台电缆密封贯穿装置的设计研究

深水半潜式生产平台电缆密封贯穿装置的设计至关重要,相比以往的常规钻采平台、上部模块等设计要求更高。本文通过深水半潜式生产平台“深海一号”的建造设计经验,对深水半潜式生产平台电缆密封贯穿装置的设计有关注意事项进行总结,对指导深水半潜式生产平台电缆密封贯穿装置的设计有重要参考意义。

涂料产品检验检测现状浅析及展望

简要介绍了涂料有害物质及性能检测标准体系现状,梳理了ASTM(美国材料与试验协会)建筑涂料方法标准与国内标准的异同,分析了涂料产品质量监督抽查出现的不合格项目,提出了欧盟REACH法规SVHC(高度关注物质)、涂料成膜物质鉴定等检验检测需求,从不同机构间数据的差异、行业间指标定义的差异、企业标准化水平的差异、产品标准的空白等方面讨论了涂料产品检验检测中存在的风险,最后从标准化角度提出了检验检测技术机构从事涂料标准化工作的建议。

农产品质量安全检验检测体系建设现状分析及建议

农产品质量安全检测作为农产品质量安全监管体系建设中的重要环节,对维护农产品质量安全、保障人民群众身体健康和生命安全具有重要作用。如何提高农产品质量检测水平、切实加强农产品质量安全检测工作,已经成为当前一项十分迫切的任务。本文分析了我国农产品质量安全检验中存在的问题,并提出了可行性建议,仅供有关部门参考。